"Fake books" allow musicians to quickly learn the chord changes to tunes. The form of fake books can vary widely, from cryptic collections of nothing but chord symbols to fully realized treble and bass lines of the song structure, complete with chord symbols and lyrics. Searching in the onlne catalog for fake book will yield a number of different examples in the Library's general collection. For the history of fake books, see Barry Kernfeld's The Story of Fake Books, below.